A ball of mass 0.1 kg is thrown vertically upwards with an initial velocity of 80 m/s. Calculate the potential energy (i) halfway up (ii) at its maximum height. What is the kinetic energy as it leaves the ground?

Answer 1

ground K.E. ... 1/2 * 0.1 kg * 80 m/s = ? Joules

(i) P.E. halfway equals half of ground K.E.

(ii) max P.E. equals ground K.E.